[alt-photo] Re: Gum over cyanotype question

[Henry Rattle]

Matt - is your FA HP sized before the first coat? I sized with
gelatin/formaldehyde before starting, and found this paper got pretty slick
after a coat or two.

Henry


On 27/02/2012 16:21, "Willen, Matthew S" <willenm at etown.edu> wrote:

> Hi Francis
> Fabriano Hot Press extra white, 300 lbs
> Potassium, 1 part gum, part mixed gum/pigment, 2 parts Na dichromate
> Gum exposure about 8 minutes under a bank of 12 uvbl bulbs.
> 
> --Matt
> 
> On 2/27/12 10:57 AM, "francis schanberger" <frangst at gmail.com> wrote:
> 
>> These will probably help the discussion:
>> 
>> What paper are you using?
>> What is the gum sensitizer mixture? (ammonium or potassium dichromate)
>> (1:1
>> or ?)
>> How long is your gum exposure?
>> 
>> -francis
>> 
>> 
>> -- 
>> francis schanberger
>> 
>> www.francisschanberger.com
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